<!-- ORTHORHOMBIC I SPACE GROUPS -->
<input type="checkbox" name="spacegroups[]" id="sg_I222" value="I222"> I222<br/>
<input type="checkbox" name="spacegroups[]" id="sg_I212121" value="I212121"> I212121<br/>
<!-- 
<input type="checkbox" name="spacegroups[]" id="sg_I222A" value="I222A"> I222A<br/>
-->